Der Einfluß von Stickstoffsubstituenten bei der Synthese von 3-Methyl-1,4-Benzoxazinen
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Dependence of nitrogensubstituents in the synthesis of 3-methyl-1,4-benzoxazines
Starting from1 the azomethine2 is obtained. The intermediates4 a and4 b of this reaction sequence cause the high yields. Cyclization of theN-alkylderivatives4 d and8 b leads also to an azomethine, which is obtained as its salt11. Cyclization of theN-acetylderivative13 yields however the anamine14. The structures of the new products are established by chemical and spectroscopic methods.
Keywordso-Aminophenoxyacetons, cyclization of 3-Methyl-2H-1,4-benzoxazines 3-Methyl-4H-1,4-benzoxazines
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